iOS Custom Icons and Images

Here’s info on application images/icons/etc. for size/resolution:

iPhone Human Interface Guidelines: Creating Custom Icons and Images.

Here’s some more info on naming conventions, etc.:

http://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BuildTimeConfiguration/BuildTimeConfiguration.html#//apple_ref/doc/uid/TP40007072-CH7-SW12